By default, when you click Gmail’s Compose button, you get a window that appears in the right corner of the screen. Check out how to have full screen compose window from this article on PCWorld.com.

Now there’s a new option. In the top-right corner of that Compose window, you’ll see three icons: Minimize, Full-screen, and Close. Clicking that middle one enlarges the window, though the description “full-screen” is a little disingenuous here: you actually get a larger, centered window that darkens the background.

At least, that’s how it appears on my system, which runs at 1,920 x 1,080. If you have a lower-resolution screen, the window may indeed seem closer to full-screen. (Anyone running, say, a 1,366 x 768 display? Hit the comments and let your fellow readers know if the window really is “full-screen,” or still just bigger and centered.)

In any case, I greatly prefer that enlarged Compose window, and want it to appear every time I write a message–without me having to click the aforementioned icon.

Fortunately, it’s easy to make this the default:

1. After you click Compose, look for the little arrow in the lower-right corner of the Compose window.

2. Click that arrow, then choose Default to full-screen.

That’s it! Now you’ll get the big window every time. If you decide you prefer the smaller window, just repeat the process.